Ventilating apparatus



Patented July 23, 1929;

UNITED STATES @FFECE.

WILLIAM FINNEY HI LPor, or rnnivonrown, new JERSEY.

VENTILATING APPARATUS.

Application filed August 17, 1928. Serial No. 300,344.

mosphere by said fan, and re-circulated within the incubator inclosure by the fan; said valve being controlled by operative connec tion with a thermostat, within the incubator inclosure, and preferably of what known as the wafer type.

As hereinafter described, my improved valve is a cylindrical band, conveniently formed or" sheet metal, and having a crossbar at the top thereof provided with a piv-, otal connection for a lever by which said valve is supported for vertical reciprocation in an air port in the top wall of the incubator nclosure; said inclosure having a false ceiling wall, in spaced relation with said top wall, with an air passage between themjtor the recirculated air.

My invention includes the various novel features of construction and arrangement hereinafter more definitely specified.

In said drawings; F i 1 is a fragmentary vertical sectional view of the upperportion of an incubator inclosure.

Fig. II is a perspective view otthe' valve shown in Fig. I, with a portion of its supporting lever pivotally connected therewith.

In said figures; the incubator inclosure 1 v has the inner false ceiling wall 2 in such its flangesi). Said fan is thus so arranged to spaced relation with the outer top wall 3 as to form air passages 4: between them. The air ports 5 and 6 in the respective walls 2 and 3 are circular and arranged in coaxial'relation. The rotary fan 7 which is in coaxial relation with said air ports 5 and 6, is adapted to be operated by the electric motor 8, conveniently rigidly connected with said wall 2 by induce influx of air to said inclosure 1 clownwardly thru' the port 5; the air being drawn into said fan 7 thru the air port6, leading from the outer atmosphere and thru the air passages i which are in communication with the interior or" the inclosure 1 at the sides or" the latter.

As, during the process of incubation, eggs absorb a considerable amount of oxygen, it is highly important to supply the interior of the inclosure 1 with sufic-ient fresh air. However, as incubation is effected during the spring season of the year when it is necessary to artificially heat the interior of the incubator inclosure to maintain the proper incubating temperature; it is desirable to minimize, as far as is safely possible, the introduction of the outer cooler atmospheric air and thus minimize the expense for heating purposes. Moreover, it is also highly'important that the atmosphere within the incubator inclosure 1 shall not become overheated, tor a rise or even one degree F, above that at which maxi-mum ofiiciency of incubation is attained, is sufiicient to kill the egg germs and thus render incubation nnpossible. Therefore, it is the ob- ]ect and efi'ect .ot my invention to precisely regulate the relative volumes of air, drawn by the fan 7 from the outer'atmosphere thru the port 6 and re-circulated thru the air passages 4-, from the inner heated atmosphere of the incubator, so as to attain the most eflicient incubating condition. To that end, I provide the air valve 11, which is a cylindrical tube formed of a band of sheet metal fitted to reciprocate freely in said outer wall port 6, in coaxial relation therewith, and open at each end. Said valve has cross bars 12 rigidly connected with the upper outer end thereof and supporting, at the axis thereof, the bear,- ing 13, for connection, by the pivot 14, with the valve suspension lever 16. Said lever 16 is provided at its end opposite to said valve 11 with a counterbalance which may be a spring but which is exemplified by the weight 17. Said lever is fulcrumed at 18, between its ends, to the support-19 which. is conveniently formed as a tube extending thru said walls 2 and 3, in rigid relation therewith, and carrying, at its lower end, the thermostatic wafer the inner face of the top wall 3. However,

the construction and arrangement are such that increase of temperature in said inner atmosphere causes said thermostat 21 to draw inwardly the valve 11, by its lever 16, so as to lessen the effective area of said-air pas sages a at the fan 7 with the eileot of lessening the flow of the warm, re-circulated, air to the fan and increasing the flow of the outer, cooler, air to the fan.

Of course, not only the relative volumes of the fresh and ire-circulated air but also the relative rate of flow thereof, to the fan, are varied in accordance with the position of said valve with reference to the fan.

In the embodiment of my invention indicated, the range of movement of the valve, indicated by the parallel dotted lines in Fig. I, is two and one-half inches; the outer air port 6 being nine inches in diameter and the fan 7 being sixteen inches in diameter.

However, I do not desire to limit myself to the precise details of construction and arrangement or relative size of the elements aforesaid, as it is obvious that various modifications may be made therein without departing from the essential features of my invention, as defined in the appended claims.

I claim:

1. In ventilating apparatus; the combination with two, respectively inner and outer, walls in spaced relation, with an air passage between them; and air ports thru the respective walls, in coaxial relation; of a rotary fan local to said ports, and arranged to induce influx of air; a valve, including a tube fitted to reciprocate in said outer wall port, in coaxial relationtherewlth, and open at each enu; a lever pivotally connected, at one end, to said valve, and having a counterbalance at itsother end; a fulcrum support for said lever, between its ends; a thermostat, local to Said inner wall, operatively' connected to said lever, and arranged to move said valve inwardly, and thereby diminish the effective area of said air passage in accordance with increase in temperature of the atmosphere local to said thermostat: whereby, the relative volumes of air flowing to said fan, respectivelythru said valve and thru said passage are varied in accordance with said temperature, to regulate the latter.

2. In ventilating apparatus; the combination with two, respectively inner and outer, walls in spaced relation, with an air passage between them and air ports thru the respective walls; of a rotary fan local to said ports, and arranged to induce influx of air a valve,

including a tube fitted to reciprocate in one of said ports; alever pivotally connected to said valve, and having a counterbalance for said valve; a fulcrum support for said lever;

and a thermostat, operatively connectedto said lever, and arranged to move said valve,

air flowing to said fan, respectively thru said valve and thru sald passage are varied in ac cordance with said temperature, to regulate the latter.

3. In ventilating apparatus; the combination with a wall having an air port thru it; of a rotary fan local to said port and arranged to induce influx of air a valve, including an open tube fitted to reciprocate in said port; a lever pivotally connected to said valve; a thermostat, operatively connected to said lever, and arranged to move said valve toward and away from said fan and thereby vary the volume of air flow thru said port in accordance with variations in temperature of the atmosphere local to said thermostat; and thereby regulate such temperature,

l. In ventilating apparatus; the combination with means forming an air port; of

a rotary fan local to said port and arranged to induce flux of air therethru; a Valve, including a tube fitted to reclprocate in said gort; a

theri'nostat, operatively connected to said valve and arranged to move said valve toward and away from said fan and thereby vary the rate of airflow thru said port,-in accordance with variations in temperature of the atmosphere local to said thermostat.

5. In ventilating apparatus; the combinathru said valve and exterior thereto;'1n ac cordance with the temperature of the mixture, to regulate such temperature.

6. In ventilating apparatus; the combination with a rotary fan; of a valve, including a tube fitted to move toward and away from said fan; and a thermostat, connected to move said valve, and thereby vary the relative vol umes of air passing to said fan, respectively thru said valve and exterior thereto, in accordance with thetemprature of the atmosphere local to said thermostat; to regulate such temperature. 4 v

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsylvania, this Nineteenth day of July, 1928.

WILLIAM. FIN-NEY HILLPOTQ I 

